Comment 3 for bug 1584029

I've catch it again.

Steps:
1. Deploy MOS 9.0 #495
2. Update quotas for creation a lot of networks:
   neutron quota-update --network 50 --subnet 50 --router 50 --port 250
3. Create max count of networks, subnets, launch instance on each
4. When no more place on computes to create new instances - wait until all created instances reach ACTIVE status.
5. Delete created instance

Actual result:

One of instances reach ERROR status

Trace (from instance):

http://paste.openstack.org/show/520593/

Diagnostic snapshot attached.